/* Library 2026 — shared spacing, type, surfaces, and resource semantics. */
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html[data-theme=dark]{--ld-bg:#151722;--ld-surface:#1d2030;--ld-ink:#ecebf5;--ld-muted:#a2a4b9;--ld-border:#303346;--ld-brand:#a8c7fa;--ld-soft:#263d60}
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.ex-body *, .ex-body *:before,.ex-body *:after{box-sizing:border-box}
.ex-body button,.ex-body select,.ex-body input{font-family:inherit}
.ex-body button:focus-visible,.ex-body a:focus-visible,.ex-body select:focus-visible{outline:3px solid #92b9ed;outline-offset:3px}
.ex-body .lib-shell{--q-primary:var(--ld-brand);--q-primary-soft:var(--ld-soft);--q-cta:#0b57d0;--q-slide-accent:#0b57d0;--lib-action-coral:var(--ld-brand);--lib-action-coral-soft:var(--ld-soft);--lib-action-coral-hover:#0842a0;min-height:calc(100dvh - var(--q-nav-height))}
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.lib-side-heading{padding:0 12px 25px;font-size:11px;letter-spacing:1.4px;color:var(--ld-brand);font-weight:900}.lib-side-heading span{display:block;letter-spacing:0;font-size:11px;font-weight:650;color:var(--ld-muted);margin-top:3px}
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.ex-body .lib-nav-item .lib-ic{width:19px;height:19px;flex:0 0 19px}.ex-body .lib-nav-item .lib-ic-svg{width:19px;height:19px}
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.ex-body .lib-nav-sep{margin:22px 12px 12px;background:var(--ld-border)}
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.ex-body .lib-main.lib-main-page,.ex-body .lib-shell-home .lib-main.lib-main-home{max-width:1400px;padding:30px 36px 56px;margin:0 auto;background:transparent}
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html.lib-sidebar-collapsed{--q-sidebar-width:76px}
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/* Welcome flow. */
.ex-body.ex-on-wizard{overflow:auto!important;background:var(--ld-bg)}.lib-welcome{min-height:100dvh;background:var(--ld-bg);color:var(--ld-ink)}.lib-welcome-top{height:86px;max-width:1320px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:0 40px}.lib-welcome-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:900;color:var(--ld-ink);text-decoration:none;letter-spacing:-.5px}.lib-welcome-brand img{width:34px;height:34px;border-radius:10px}.lib-welcome-brand span{font-weight:600;color:var(--ld-muted)}.lib-welcome-language{display:flex;align-items:center;gap:8px;color:var(--ld-muted)}.lib-welcome-language>.lib-ic{width:17px;height:17px}.lib-welcome-language select{padding:8px 2px;border:0;background:transparent;font-size:12px;color:var(--ld-ink);font-weight:750;cursor:pointer}
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@keyframes lib-enter{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}
html[data-theme=dark] .lib-discovery-type-tabs{background:#222b36}html[data-theme=dark] .lib-design-cover{filter:brightness(.77)}html[data-theme=dark] .lib-res-card__eyebrow{background:#382c4d;color:#c6adfa}html[data-theme=dark] .lib-res-card[data-kind=article] .lib-res-card__eyebrow{background:#3c3428;color:#dfc089}html[data-theme=dark] .lib-res-card[data-kind=slide] .lib-res-card__eyebrow{background:#233c39;color:#93d4c8}html[data-theme=dark] .lib-welcome-story{background:#282239;border-color:#3b304e}html[data-theme=dark] .lib-welcome-story h2{color:#e1d3fb}html[data-theme=dark] .lib-welcome-story>p{color:#ab9bbf}
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@media(max-width:359px){.ex-body .ex-grid.lib-resource-grid{grid-template-columns:1fr}.lib-welcome-brand span{display:none}.ex-body .lib-discovery-type-tab{font-size:10px;padding:7px 6px}.lib-welcome-topics{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.ex-body *,.ex-body *:before,.ex-body *:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Isolate layout dimensions from the optional theme provider's root tokens. */
body.ex-body{--q-sidebar-width:216px;--q-nav-height:var(--qmf-header-h,58px);--q-primary:var(--ld-brand);--q-primary-soft:var(--ld-soft);--q-border:var(--ld-border)}
html.lib-sidebar-collapsed body.ex-body{--q-sidebar-width:76px}
.ex-body .lib-nav-main{gap:3px}.ex-body .lib-nav-item{margin-bottom:0}
.sheet-quiz span{white-space:nowrap;letter-spacing:4px}
.ex-body .ex-grid.lib-type-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.ex-body .lib-page{border:0;background:transparent;box-shadow:none}
.ex-body .lib-page-head{padding:0 0 22px;border:0;background:transparent}.ex-body .lib-page-title{font-size:25px;letter-spacing:-.6px}
.ex-body .lib-type-layout{border:1px solid var(--ld-border);border-radius:13px;background:var(--ld-surface);box-shadow:none;overflow:hidden}.ex-body .lib-type-rail{border-right:1px solid var(--ld-border);background:var(--ld-surface);width:165px}.ex-body .lib-type-body{padding:18px}.ex-body .lib-type-toolbar{box-shadow:none;background:var(--ld-surface);border-bottom:1px solid var(--ld-border);padding:0 0 15px}.ex-body .lib-type-cat{border-radius:7px;font-size:12px}.ex-body .lib-type-cat.on{color:var(--ld-brand);background:var(--ld-soft);box-shadow:none}
.ex-body .lib-detail-row{background:var(--ld-surface);border:1px solid var(--ld-border);border-radius:10px;box-shadow:none}.ex-body .lib-detail-row>.lib-res-cover{width:110px;min-width:110px;max-width:110px;height:100px}.ex-body .lib-detail-title{font-size:14px;color:var(--ld-ink)}
@media(max-width:900px){body.ex-body{--q-sidebar-width:190px}.ex-body .lib-type-layout{display:block}.ex-body .lib-type-rail{width:100%;border-right:0;border-bottom:1px solid var(--ld-border)}.ex-body .lib-type-cats{display:flex;overflow:auto}.ex-body .lib-type-cat{white-space:nowrap}}
@media(max-width:720px){body.ex-body,html.lib-sidebar-collapsed body.ex-body{--q-sidebar-width:0px;--q-nav-height:var(--qmf-header-h,58px)}.ex-body .lib-type-body{padding:12px}.ex-body .lib-type-toolbar{flex-wrap:wrap}.ex-body .lib-type-tools{flex-wrap:wrap}.ex-body .lib-page-head{padding:0 0 18px}.ex-body .lib-type-search{min-width:0}.ex-body .lib-type-search input{width:100%;min-width:0}}
@media(max-width:440px){.ex-body .ex-grid.lib-type-grid{grid-template-columns:1fr}}
.ex-body .ex-overlay{background:#22203670;backdrop-filter:blur(4px)}.ex-body .ex-overlay-panel{border-radius:14px;background:var(--ld-surface);border:1px solid var(--ld-border);box-shadow:0 24px 80px #231d3b25;max-width:720px}.ex-body .ex-overlay-head{padding:16px 18px;border-bottom:1px solid var(--ld-border);gap:12px}.ex-body .ex-overlay-head input{font-size:14px;color:var(--ld-ink)}.ex-body .ex-overlay-head .ex-btn{border-radius:8px;min-height:34px;padding:0 14px;font-size:11px;box-shadow:none}.ex-body .ex-overlay-head .ex-btn-primary,.ex-body .ex-hit .ex-btn-primary{background:var(--ld-brand);color:#fff}.ex-body .ex-overlay-body{padding:12px 18px}.ex-body .ex-suggest{font-size:13px;border-radius:8px;color:var(--ld-ink)}.ex-body .ex-hit{border-radius:9px;padding:12px 8px;color:var(--ld-ink);border-bottom:1px solid var(--ld-border)}.ex-body .ex-hit .t{font-size:13px}.ex-body .ex-hit .s{font-size:10px;color:var(--ld-muted)}.ex-body .ex-hit .ex-btn{font-size:11px;min-height:30px;border-radius:7px;box-shadow:none}.ex-body .ex-hit .ic{background:var(--ld-soft);color:var(--ld-brand);border-radius:8px}.ex-body .ex-suggest-label{font-size:10px;color:var(--ld-muted)}
@media(max-width:720px){.ex-body .ex-overlay{padding:70px 12px 18px}.ex-body .ex-overlay-panel{width:100%;max-height:calc(100dvh - 100px)}.ex-body .ex-overlay-head{padding:12px;gap:8px}.ex-body .ex-overlay-head input{min-width:0;width:100%;font-size:12px}.ex-body .ex-overlay-head .ex-btn{padding:0 10px;font-size:10px}.ex-body .ex-overlay-body{padding:10px}.ex-body .ex-hit{gap:8px}.ex-body .ex-hit .t{font-size:12px}.ex-body .ex-hit-actions{flex-direction:column;gap:4px}.ex-body .ex-hit .ic{min-width:28px;width:28px}}
.lib-preferences-setting{margin-bottom:18px;padding:22px;border:1px solid var(--ld-border);border-radius:12px;background:var(--ld-surface)}.lib-preferences-setting p{font-size:12px;color:var(--ld-muted);margin:9px 0 17px}.lib-preferences-setting .ex-btn{background:var(--ld-brand);color:#fff;border-radius:8px;box-shadow:none;font-size:12px}
@media(max-width:720px){}
.lib-res-assign{display:flex;align-items:center;justify-content:center;gap:5px;background:transparent;color:var(--ld-brand);font-size:10px;border:0;width:100%;padding:9px 0 0;cursor:pointer;font-weight:800}.lib-res-assign .lib-ic{width:13px;height:13px}
/* Readability pass: readable text sizes and clear secondary information. */
body.ex-body{font-size:16px}
.ex-body .lib-nav-item{font-size:15px;min-height:46px;line-height:1.3}
.lib-side-heading{font-size:12px}.lib-side-heading span{font-size:12px}
.ex-body .lib-nav-group-label{font-size:11px;letter-spacing:.8px;color:var(--ld-muted)}
.lib-hero-copy h1{font-size:32px}.lib-hero-copy p{font-size:15px;color:var(--ld-muted);line-height:1.6;margin:9px 0 18px}
.ex-body .lib-hero.lib-hero-minimal{min-height:196px;padding:24px 28px;margin-bottom:24px}
.lib-kicker{font-size:11px}.ex-body .lib-search-bar__field,.ex-body .lib-search-ph{font-size:15px;color:#58647a}
.ex-body .lib-hero-minimal .lib-search-bar.lib-search-bar--hero{height:48px;min-height:48px}
.ex-body .lib-section-title{font-size:23px}.ex-body .lib-discovery-panel__sub{font-size:14px;line-height:1.6;color:var(--ld-muted)}
.ex-body .lib-text-link,.ex-body .lib-filter-btn{font-size:14px}
.ex-body .lib-discovery-type-tab{min-height:38px;font-size:14px;color:#536078;padding:8px 13px}
.ex-body .lib-discovery-type-tabs{flex:0 1 auto;width:auto;max-width:100%}
.ex-body .lib-res-card__body{padding:16px;gap:10px}
.ex-body .lib-res-card__title{font-size:16px;line-height:1.5;font-weight:800;letter-spacing:0;min-height:3em}
.ex-body .lib-res-card__meta{font-size:13px;line-height:1.45;color:var(--ld-muted)}
.ex-body .lib-res-card__eyebrow{font-size:11px;letter-spacing:.35px;padding:5px 8px;color:#57349c;background:#eee6ff}
.ex-body .lib-res-card[data-kind=article] .lib-res-card__eyebrow{color:#873f26;background:#fbe9dd}
.ex-body .lib-res-card[data-kind=slide] .lib-res-card__eyebrow{color:#096862;background:#dbf1e9}
.ex-body .lib-res-act{font-size:13px;min-height:38px}.ex-body .lib-res-act--icon{flex-basis:38px;width:38px;min-height:38px}
.ex-body .lib-res-act--primary{color:#3569ad;background:#e7f0fc}.ex-body .lib-res-act--primary:hover{color:#fff;background:#417bc6}
.ex-body .lib-res-act__ic.lib-ic .lib-ic-svg{width:18px;height:18px}
.ex-body .lib-continue-panel__title{font-size:18px}.ex-body .lib-continue-mini__title{font-size:14px;line-height:1.5}.ex-body .lib-continue-mini__eyebrow{font-size:11px}.ex-body .lib-continue-mini__meta{font-size:12px;color:var(--ld-muted)}
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.lib-welcome-step{font-size:12px}.lib-welcome-sub{font-size:14px;line-height:1.7}.lib-welcome-story>p{font-size:15px;color:#67547f}.lib-welcome-role strong{font-size:15px}.lib-welcome-role small{font-size:13px;color:var(--ld-muted)}.lib-welcome-topic{font-size:14px;min-height:48px}.lib-welcome-primary,.lib-welcome-back{font-size:14px}.lib-welcome-skip{font-size:13px}.lib-welcome-footer{font-size:12px}.lib-welcome-language select{font-size:14px}
/* Thumbnail posters: strong silhouette + topic, different visual grammar per format. */
.ex-body .lib-res-card__cover,.ex-body .lib-res-cover--ratio{height:140px}
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.lib-design-cover.lib-res-cover--game{--cover-bg:#a23f73;--cover-ink:#fff;background:linear-gradient(120deg,#ad4a85,#7e2c63)}
.lib-design-cover--v1{background-position:40% 0}.lib-design-cover--v2{background-size:130% 100%}
.lib-cover-brand{left:17px;top:16px;font-size:9px;line-height:1;font-weight:900;letter-spacing:2px;opacity:.85;color:#fff}
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.lib-cover-quiz{position:absolute;right:19px;top:18px;width:98px;height:110px;background:#fcfaff;transform:rotate(-8deg);border-radius:12px;box-shadow:7px 7px 0 #ffffff22;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#6440bc;gap:5px;z-index:2}.lib-cover-quiz b{font-size:65px;line-height:.95;font-weight:900;font-family:Georgia,serif}.lib-cover-quiz>span{display:flex;gap:5px}.lib-cover-quiz i{display:grid;place-items:center;width:20px;height:19px;background:#eee7fb;border-radius:4px;font-size:11px;font-weight:850;font-style:normal}.lib-cover-quiz i:first-child{color:#fff;background:#7a54d5}
.lib-cover-slides{position:absolute;right:19px;top:36px;width:113px;height:79px;transform:rotate(-8deg);z-index:2}.lib-cover-slides>span{position:absolute;inset:8px -8px -8px 8px;border-radius:7px;background:#ffffff45}.lib-cover-slides>div{position:absolute;inset:0;background:#eefaf4;border:1px solid #ffffffc9;box-shadow:0 5px 12px #033f3d20;border-radius:7px;color:#11746e;display:grid;place-items:center}.lib-cover-slides .lib-ic{position:absolute;top:10px;left:10px;width:17px;height:17px}.lib-cover-slides b{font-size:33px;margin:6px 0 0 5px;color:#1c8c7b}
.lib-cover-emblem--game{background:#fff0f7;color:#9a3e76;transform:rotate(10deg)}.lib-cover-emblem--game .lib-ic,.lib-cover-emblem--game .lib-ic-svg{width:58px;height:58px}
.lib-cover-dot{width:205px;height:205px;right:-36px;top:-60px;opacity:.14;border-color:#fff}.lib-cover-dot:after{inset:26px}
.lib-res-cover--sm .lib-cover-brand,.lib-res-cover--sm .lib-cover-topic{display:none}.lib-res-cover--sm .lib-cover-emblem,.lib-res-cover--sm .lib-cover-quiz{width:57px;height:72px;right:14px;top:17px;gap:4px;border-radius:6px}.lib-res-cover--sm .lib-cover-emblem b{font-size:34px}.lib-res-cover--sm .lib-cover-quiz b{font-size:42px}.lib-res-cover--sm .lib-cover-quiz i{width:11px;height:11px;font-size:7px}.lib-res-cover--sm .lib-cover-emblem i{width:30px;height:2px}.lib-res-cover--sm .lib-cover-slides{width:59px;height:44px;right:16px;top:31px}.lib-res-cover--sm .lib-cover-slides b{font-size:20px}.lib-res-cover--sm .lib-cover-slides .lib-ic{display:none}
/* The shared header owns its chrome. Sidebar control belongs to Library. */
.ex-body .lib-sidebar .lib-header-rail-toggle{position:absolute;right:10px;left:auto;top:18px;width:29px;height:29px;border:1px solid var(--ld-border);border-radius:7px;background:var(--ld-surface);color:var(--ld-muted);display:grid;place-items:center;padding:4px;cursor:pointer;box-shadow:none}
.ex-body .lib-shell--sidebar-collapsed .lib-header-rail-toggle{display:none}
html[data-theme=dark] .lib-design-cover{filter:none}html[data-theme=dark] .lib-res-card__meta{color:#bac2d5}html[data-theme=dark] .lib-search-ph{color:#b7c1d6}html[data-theme=dark] .lib-res-act--primary{color:#d1e5ff;background:#2b3c52}html[data-theme=dark] .lib-discovery-type-tab{color:#bac2d5}html[data-theme=dark] .lib-welcome-story>p{color:#c1b1d4}
@media(max-width:1120px){.lib-hero-copy h1{font-size:30px}.ex-body .lib-nav-item{font-size:14px}.lib-cover-topic{font-size:17px;max-width:51%;width:51%}.lib-cover-emblem{right:14px;width:83px}.lib-cover-quiz{right:14px;width:87px}.lib-cover-slides{right:16px;width:97px}}
@media(max-width:720px){.ex-body .lib-sidebar{display:none!important}.ex-body .lib-main.lib-main-page,.ex-body .lib-shell-home .lib-main.lib-main-home{padding:20px 16px 96px}.ex-body .lib-hero.lib-hero-minimal{padding:21px;min-height:0}.lib-hero-copy h1{font-size:28px}.lib-hero-copy p{font-size:14px;line-height:1.6}.ex-body .lib-search-bar__field,.ex-body .lib-search-ph{font-size:14px}.ex-body .lib-discovery-panel__sub{font-size:13px}.ex-body .lib-discovery-toolbar__row{display:flex;flex-wrap:wrap;gap:10px}.ex-body .lib-discovery-type-tabs{width:100%;max-width:100%;gap:3px;overflow-x:auto}.ex-body .lib-discovery-type-tab{flex:0 0 auto;font-size:13px;min-height:40px;padding:8px 11px}.ex-body .lib-filter-btn{font-size:13px;min-height:38px}.ex-body .lib-res-card__cover,.ex-body .lib-res-cover--ratio{height:124px}.ex-body .lib-res-card__body{padding:12px;gap:9px}.ex-body .lib-res-card__title{font-size:15px;line-height:1.5;min-height:4.5em}.ex-body .lib-res-card__meta{font-size:12px}.ex-body .lib-res-card__eyebrow{font-size:10px}.ex-body .lib-res-act{font-size:12px;min-height:38px;padding:0 9px}.ex-body .lib-res-act--icon{flex-basis:34px;width:34px;min-height:38px}.ex-body .lib-bottom-item{font-size:11px;color:var(--ld-muted)}.ex-body .lib-bottom-item[data-nav=my-resources]{font-size:10px}.lib-cover-brand{left:12px;top:13px;font-size:8px;letter-spacing:1.5px}.lib-cover-topic{left:12px;top:37px;width:57%;max-width:57%;font-size:14px;line-height:1.25;z-index:3}.lib-cover-emblem{width:57px;height:76px;right:9px;top:35px;opacity:.96;transform:rotate(8deg)}.lib-cover-emblem b{font-size:37px}.lib-cover-emblem i{width:30px;height:2px}.lib-cover-emblem i:last-child{width:20px}.lib-cover-quiz{right:8px;top:32px;width:58px;height:80px;border-radius:8px;gap:5px}.lib-cover-quiz b{font-size:43px}.lib-cover-quiz i{width:13px;height:13px;font-size:8px}.lib-cover-quiz>span{gap:3px}.lib-cover-slides{right:8px;top:45px;width:64px;height:46px}.lib-cover-slides b{font-size:23px}.lib-cover-slides .lib-ic{display:none}.lib-cover-emblem--game .lib-ic,.lib-cover-emblem--game .lib-ic-svg{width:37px;height:37px}.lib-cover-dot{right:-85px}.lib-welcome-story>p{font-size:13px}.lib-welcome-sub{font-size:14px}.lib-welcome-role small{font-size:12px}.lib-welcome-form h1{font-size:26px}.lib-welcome-language select{font-size:13px}.lib-welcome-step{font-size:11px}.lib-welcome-primary{min-height:48px}.lib-welcome-skip{font-size:13px}.ex-body .ex-overlay-head input{font-size:16px}}

@media(max-width:720px){.lib-design-cover .lib-cover-topic{width:47%;max-width:47%}}
/* Responsive content flow: the catalog uses the available width, with no nested panel. */
.ex-body .lib-page--catalog{width:100%;min-width:0;max-width:100%}
.ex-body .lib-page--catalog .lib-page-head{padding:0;margin-bottom:22px}
.ex-body .lib-page--catalog .lib-page-sub{font-size:15px;line-height:1.6;color:var(--ld-muted);max-width:none}
.ex-body .lib-page--catalog .lib-page-body{padding:0;border:0;border-radius:0;background:transparent;box-shadow:none;min-width:0}
.ex-body .lib-discovery-toolbar--catalog{width:100%;min-width:0;margin:0 0 22px}
.ex-body .lib-discovery-toolbar--catalog .lib-discovery-toolbar__row{display:block;min-width:0}
.ex-body .lib-discovery-toolbar--catalog .lib-discovery-type-tabs{display:flex;flex-wrap:nowrap;gap:5px;width:100%;max-width:100%;min-width:0;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin;padding:5px;border-radius:11px}
.ex-body .lib-discovery-toolbar--catalog .lib-discovery-type-tab{flex:0 0 auto;min-height:40px;padding:9px 14px;font-size:14px;white-space:nowrap}
.ex-body .lib-catalog-topic-title{font-size:19px;margin:0 0 15px;color:var(--ld-ink)}
.ex-body .lib-resource-grid>.lib-res-card{margin:0;width:100%;min-width:0;height:100%}
.ex-body .lib-res-card__body{min-width:0}.lib-res-card__title button{overflow-wrap:anywhere}
@media(min-width:721px) and (max-width:1199px){.ex-body .ex-grid.lib-resource-grid,.lib-skeleton-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){
 .ex-body .lib-page--catalog .lib-page-head{margin-bottom:18px;padding:0}
 .ex-body .lib-page-title{font-size:26px;line-height:1.25}
 .ex-body .lib-page--catalog .lib-page-sub{font-size:14px;line-height:1.6;margin-top:7px}
 .ex-body .lib-discovery-toolbar--catalog{margin-bottom:20px}
 .ex-body .lib-discovery-toolbar--catalog .lib-discovery-type-tabs{border-radius:10px;padding:4px}
 .ex-body .lib-discovery-toolbar--catalog .lib-discovery-type-tab{min-height:40px;padding:9px 12px;font-size:13px}
 .ex-body .lib-catalog-topic-title{font-size:18px;margin-bottom:14px}
 .ex-body .lib-bottom-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;align-items:stretch;padding:5px 6px calc(5px + env(safe-area-inset-bottom,0px));min-height:66px;width:100%}
 .ex-body .lib-bottom-item{min-width:0;width:100%;padding:6px 2px;min-height:54px;justify-content:center;gap:5px;border-radius:8px}
 .ex-body .lib-bottom-item span:not(.lib-ic){display:block;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:11px;line-height:1.2}
 .ex-body .lib-bottom-item .lib-ic{display:inline-flex;width:21px;height:21px;flex:0 0 21px}
 .ex-body .lib-bottom-item .lib-ic-svg{width:21px;height:21px}
 .ex-body .lib-main.lib-main-page,.ex-body .lib-shell-home .lib-main.lib-main-home{padding-bottom:calc(88px + env(safe-area-inset-bottom,0px))}
 .ex-body .lib-detail-row{flex-wrap:wrap;min-width:0}.ex-body .lib-detail-main{min-width:0}.ex-body .lib-detail-actions{flex-wrap:wrap}
}
@media(max-width:479px){
 .ex-body .ex-grid.lib-resource-grid,.ex-body .ex-grid.lib-type-grid,.lib-skeleton-grid{grid-template-columns:minmax(0,1fr)}
 .ex-body .lib-res-card__cover,.ex-body .lib-res-cover--ratio{height:140px}
 .ex-body .lib-res-card__body{padding:15px;gap:10px}
 .ex-body .lib-res-card__title{font-size:16px;min-height:0;-webkit-line-clamp:3;line-height:1.5}
 .ex-body .lib-res-card__meta{font-size:13px}
 .ex-body .lib-res-act{min-height:42px;font-size:13px}.ex-body .lib-res-act--icon{width:42px;flex-basis:42px;min-height:42px}
 .lib-design-cover .lib-cover-topic{left:17px;top:48px;width:53%;max-width:53%;font-size:20px}
 .lib-cover-brand{left:17px;top:17px;font-size:9px}
 .lib-cover-emblem{width:92px;height:106px;right:19px;top:22px}.lib-cover-emblem b{font-size:53px}.lib-cover-emblem i{width:45px;height:3px}
 .lib-cover-quiz{width:98px;height:110px;right:20px;top:18px;border-radius:12px}.lib-cover-quiz b{font-size:65px}.lib-cover-quiz>span{gap:5px}.lib-cover-quiz i{width:20px;height:19px;font-size:11px}
 .lib-cover-slides{width:113px;height:79px;right:20px;top:36px}.lib-cover-slides b{font-size:33px}.lib-cover-slides .lib-ic{display:block}
 .ex-body .lib-hero-copy h1{font-size:26px}.ex-body .lib-hero-art{display:none}
}
@media(hover:none){.ex-body .lib-res-card:hover{transform:none;box-shadow:0 2px 4px #20283e02}}
/* Keep tablet navigation consistent with the 720px application breakpoint. */
@media(min-width:721px){.ex-body .lib-sidebar{display:flex}.ex-body .lib-bottom-nav{display:none}}
/* Resource actions: a clear primary button and quiet, consistent utility controls. */
.ex-body .lib-res-card{container-type:inline-size}
.ex-body .lib-res-card__actions{padding-top:12px;margin-top:auto}
.ex-body .lib-res-card__actions-row{display:flex;align-items:stretch;gap:8px;width:100%;min-width:0}
.ex-body .lib-res-card .lib-res-act{position:relative;min-height:42px;border-radius:10px;font-size:13px;font-weight:800;line-height:1.2;transition:background .16s,border-color .16s,box-shadow .16s,transform .16s;cursor:pointer}
.ex-body .lib-res-card .lib-res-act--primary{display:flex;align-items:center;justify-content:center;gap:9px;flex:1 1 0;min-width:0;padding:0 13px;border:1px solid #437fce;background:#0b57d0;color:#fff;box-shadow:0 3px 7px #3c74bd1a,inset 0 1px 0 #ffffff26}
.ex-body .lib-res-card .lib-res-act--primary:hover{background:#0842a0;border-color:#0842a0;box-shadow:0 5px 12px #3c74bd28;transform:translateY(-1px)}
.ex-body .lib-res-card .lib-res-act--primary:active{transform:translateY(0);box-shadow:inset 0 2px 4px #1d417026}
.lib-res-act__label{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:center;flex:1 1 auto}
.ex-body .lib-res-act__leading,.ex-body .lib-res-act__arrow{display:inline-flex;align-items:center;justify-content:center;width:17px;height:17px;flex:0 0 17px}
.ex-body .lib-res-act__leading .lib-ic-svg,.ex-body .lib-res-act__arrow .lib-ic-svg{width:17px;height:17px}
.ex-body .lib-res-act__arrow{opacity:.85}
.ex-body .lib-res-card .lib-res-act--icon{display:inline-flex;align-items:center;justify-content:center;flex:0 0 42px;width:42px;min-height:42px;padding:0;border:1px solid #dfe2ec;background:var(--ld-surface);color:#626c82;box-shadow:0 1px 2px #20283b04}
.ex-body .lib-res-card .lib-res-act--icon:hover{border-color:#a5c2e8;background:#f1f7fe;color:#4680cb;transform:translateY(-1px)}
.ex-body .lib-res-card .lib-res-act--icon:active{transform:none;background:#e5eefa}
.ex-body .lib-res-card .lib-res-act--claim.is-on{border-color:#b6cfef;background:#e8f1fc;color:#407ac6;box-shadow:inset 0 0 0 1px #407ac608}
.ex-body .lib-res-card .lib-res-act:focus-visible{outline:3px solid #a1c4f1;outline-offset:3px;box-shadow:0 0 0 1px var(--ld-surface)}
.ex-body .lib-res-card .lib-res-act:disabled{cursor:wait;transform:none;opacity:.7}
.ex-body .lib-res-card .lib-res-act[aria-busy=true] .lib-ic{opacity:0}
.ex-body .lib-res-card .lib-res-act[aria-busy=true]:after{content:'';position:absolute;left:calc(50% - 8px);top:calc(50% - 8px);width:16px;height:16px;border:2px solid #c8d8ed;border-top-color:#5089d4;border-radius:50%;animation:lib-action-spin .75s linear infinite}
@keyframes lib-action-spin{to{transform:rotate(360deg)}}
.ex-body .lib-res-assign{min-height:36px;margin:9px 0 0;padding:7px 12px;border:1px solid var(--ld-border);border-radius:9px;background:var(--ld-surface);font-size:12px;font-weight:750;color:var(--ld-brand)}
.ex-body .lib-res-assign:hover{background:var(--ld-soft);border-color:#a5c2e8}
html[data-theme=dark] .ex-body .lib-res-card .lib-res-act--primary{color:#fff;background:#0b57d0;border-color:#0b57d0}
html[data-theme=dark] .ex-body .lib-res-card .lib-res-act--icon{background:#25293a;color:#c1c9dc;border-color:#42485f}
html[data-theme=dark] .ex-body .lib-res-card .lib-res-act--icon:hover{color:#dfedff;background:#2a384b;border-color:#6d96cc}
html[data-theme=dark] .ex-body .lib-res-card .lib-res-act--claim.is-on{background:#2c3f58;color:#c8e0ff;border-color:#7299cb}
@container(max-width:270px){.ex-body .lib-res-act__arrow{display:none}.ex-body .lib-res-card .lib-res-act--primary{padding:0 10px;gap:7px}}
@media(max-width:720px){.ex-body .lib-res-card .lib-res-act{min-height:44px;font-size:13px}.ex-body .lib-res-card .lib-res-act--icon{width:44px;flex-basis:44px;min-height:44px}.ex-body .lib-res-card .lib-res-act--preview{display:none}.ex-body .lib-res-card__actions{padding-top:10px}}
@media(max-width:479px){.ex-body .lib-res-card .lib-res-act--preview{display:inline-flex}}
@media(hover:none){.ex-body .lib-res-card .lib-res-act:hover{transform:none}}
@media(prefers-reduced-motion:reduce){.ex-body .lib-res-card .lib-res-act[aria-busy=true]:after{animation:none}}
.ex-body .lib-res-act .lib-ic{color:inherit}

/* No scrollbar chrome in expanded or collapsed Library navigation. */
.ex-body .lib-sidebar,
.ex-body .lib-sidebar__scroll {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.ex-body .lib-sidebar::-webkit-scrollbar,
.ex-body .lib-sidebar__scroll::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}
/* Scope shared-header action colors to Library only. */
.ex-body #lab-header .lab-header__join-quiz {
  background: #0b57d0 !important;
  border-color: #0b57d0 !important;
  box-shadow: none !important;
  color: #fff !important;
}
.ex-body #lab-header .lab-header__join-quiz:hover {
  background: #0842a0 !important;
  border-color: #0842a0 !important;
}
.ex-body #lab-header .lab-header__nav-link:is(.is-active, :hover) {
  background: var(--ld-soft);
  color: var(--ld-brand);
}
.ex-body #lab-header :is(button, a):focus-visible {
  outline-color: var(--ld-brand);
}

/* Quiz launch: the shared Library stays neutral; quiz actions get game depth. */
.ex-body .lib-res-card .lib-res-act--quiz {
  min-height:50px; padding:5px 10px 5px 6px; gap:8px; border:1px solid #5899ff;
  border-bottom:0; border-radius:14px; background:linear-gradient(180deg,#2878ef,#0b57d0);
  color:#fff; box-shadow:0 5px 0 #083b91,0 7px 12px #0b57d024,inset 0 1px 0 #ffffff40;
  margin-bottom:5px; font-size:15px; font-weight:900; letter-spacing:.1px;
}
.ex-body .lib-res-card .lib-res-act--quiz:hover {background:linear-gradient(180deg,#3888ff,#1568e5);border-color:#8ab9ff;box-shadow:0 6px 0 #083b91,0 10px 18px #0b57d02b;transform:translateY(-1px)}
.ex-body .lib-res-card .lib-res-act--quiz:active {transform:translateY(4px);box-shadow:0 1px 0 #083b91}
.lib-res-act__logo {flex:0 0 32px;width:32px;height:32px;border-radius:9px;transform:rotate(-7deg);box-shadow:0 2px 5px #00285c40}
.lib-res-act__play {flex:0 0 28px;display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:#ffe16b;color:#173664;font-size:12px;box-shadow:0 2px 0 #d8a72e}
.ex-body .lib-res-card[data-kind=quiz] .lib-res-card__actions-row {align-items:flex-start}
.ex-body .lib-res-card[data-kind=quiz] .lib-res-act--icon {min-height:50px;border-radius:13px;box-shadow:0 3px 0 var(--ld-border)}
.ex-body .lib-res-card .lib-res-act--preview {display:inline-flex}
body.lib-play-picker-open,body.lib-quiz-preview-open {overflow:hidden}
.qm-play-mode--arcade,.lib-quiz-preview {position:fixed;inset:0;z-index:11000;display:grid;place-items:center;padding:24px;background:#070d23bd;backdrop-filter:blur(10px);box-sizing:border-box;overscroll-behavior:contain;font-family:Nunito,system-ui,sans-serif}
.qm-play-mode--arcade *,.lib-quiz-preview * {box-sizing:border-box}
.qm-play-mode--arcade .qm-play-mode__panel {position:relative;width:min(880px,100%);max-height:calc(100dvh - 48px);overflow:auto;border:2px solid #53638b;border-radius:28px;padding:24px 28px 28px;color:#fff;background:radial-gradient(ellipse at 95% 0,#44328b70,transparent 55%),#101b36;box-shadow:0 9px 0 #080f24,0 28px 90px #03091d99;scrollbar-width:thin;scrollbar-color:#53638b #101b36}
.qm-play-mode--arcade .qm-play-mode__head {display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 18px;padding:0;border:0}
.qm-play-mode__brand {display:flex;align-items:center;gap:10px;font-size:19px;font-weight:900;letter-spacing:-.6px}
.qm-play-mode__brand img {border-radius:10px}
.qm-play-mode__brand b {display:inline-block;padding:1px 9px;margin-left:3px;border-radius:8px;background:#ffe16b;color:#1c2543;transform:rotate(-6deg);font-style:italic;box-shadow:0 3px 0 #b78d24}
.qm-play-mode--arcade .qm-play-mode__close,.lib-quiz-preview__close {flex:0 0 40px;width:40px;height:40px;display:grid;place-items:center;padding:0;border:1px solid #7280a559;border-radius:12px;background:#ffffff0c;color:#d9e2ff;font:26px/1 system-ui;cursor:pointer;box-shadow:0 3px 0 #060d21}
.qm-play-mode--arcade .qm-play-mode__close:hover,.lib-quiz-preview__close:hover {background:#ffffff20;color:#fff}
.qm-play-mode--arcade #qm-play-title {margin:0;color:#fff;font-size:clamp(25px,3.3vw,34px);line-height:1.2;font-weight:1000;letter-spacing:-.8px}
.qm-play-mode__quiz-title {margin:8px 0 23px;color:#b6c4e6;font-size:14px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.qm-play-mode__section h3 {display:flex;align-items:center;gap:10px;margin:0 0 12px;color:#c4d0ed;text-transform:uppercase;font-size:12px;letter-spacing:2px;font-weight:900}
.qm-play-mode__section h3:after {content:'';height:1px;background:#8b9bc335;flex:1}
.qm-play-mode__section+.qm-play-mode__section {margin-top:24px}
.qm-play-mode--arcade .qm-play-mode__grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.qm-play-mode--arcade .qm-play-mode__grid--games {grid-template-columns:repeat(2,minmax(0,1fr))}
.qm-play-mode--arcade .qm-play-mode__tile {
  --tile-top:#2d63d2;--tile-bottom:#19409c;--tile-base:#0b275f;--tile-edge:#7ca9ff;
  position:relative;display:flex;align-items:flex-start;flex-direction:column;min-width:0;min-height:192px;padding:18px;text-align:left;overflow:hidden;isolation:isolate;
  border:1px solid var(--tile-edge);border-radius:20px;background:linear-gradient(145deg,var(--tile-top),var(--tile-bottom));color:#fff;
  box-shadow:0 6px 0 var(--tile-base),inset 0 1px 0 #ffffff35;cursor:pointer;font-family:inherit;transition:transform .15s,filter .15s,box-shadow .15s;
}
.qm-play-mode--arcade .qm-play-mode__tile:before {content:'';position:absolute;z-index:-1;width:180px;height:180px;border-radius:50%;border:25px solid #ffffff08;right:-65px;top:-65px;pointer-events:none}
.qm-play-mode--arcade .qm-play-mode__tile--quiz {--tile-top:#8b50d4;--tile-bottom:#5934a6;--tile-base:#342064;--tile-edge:#ba92f4}
.qm-play-mode--arcade .qm-play-mode__tile--assign {--tile-top:#198c6d;--tile-bottom:#11674e;--tile-base:#084331;--tile-edge:#68c9a2}
.qm-play-mode--arcade .qm-play-mode__tile--arena {--tile-top:#14495a;--tile-bottom:#0b253d;--tile-base:#061929;--tile-edge:#459bad}
.qm-play-mode--arcade .qm-play-mode__tile--tycoon {--tile-top:#c7742d;--tile-bottom:#92431d;--tile-base:#59280f;--tile-edge:#f4b77c}
.qm-play-mode--arcade .qm-play-mode__tile:hover:not(:disabled) {transform:translateY(-3px);filter:brightness(1.1);box-shadow:0 9px 0 var(--tile-base),0 12px 25px #0003}
.qm-play-mode--arcade .qm-play-mode__tile:active:not(:disabled) {transform:translateY(5px);box-shadow:0 1px 0 var(--tile-base)}
.qm-play-mode--arcade .qm-play-mode__tile:disabled {opacity:.45;cursor:default}
.qm-play-mode__logo {flex:0 0 auto;width:64px;height:64px;border-radius:17px;transform:rotate(-7deg);filter:drop-shadow(0 5px 5px #0004);margin-bottom:16px}
.qm-play-mode__copy {display:flex;flex-direction:column;gap:5px;min-width:0;padding-right:28px}
.qm-play-mode--arcade .qm-play-mode__name {font-size:23px;font-weight:1000;line-height:1.2;color:#fff;letter-spacing:-.4px}
.qm-play-mode--arcade .qm-play-mode__blurb {font-size:12px;line-height:1.45;color:#f0f4ff;margin:0;opacity:.85}
.qm-play-mode__go {position:absolute;right:15px;bottom:18px;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:#ffffff24;color:#fff;font-size:11px;box-shadow:0 2px 0 #0002}
.qm-play-mode__grid--games .qm-play-mode__tile {flex-direction:row;align-items:center;gap:18px;min-height:124px}
.qm-play-mode__grid--games .qm-play-mode__logo {width:72px;height:72px;margin:0}
.qm-play-mode__grid--games .qm-play-mode__copy {padding-right:16px}
.qm-play-mode--arcade button:focus-visible,.lib-quiz-preview button:focus-visible {outline:3px solid #ffe16b;outline-offset:4px}
/* Actual question preview, mounted independently of the lazy Library route. */
.lib-quiz-preview {z-index:10900}
.lib-quiz-preview__panel {display:flex;flex-direction:column;width:min(900px,100%);height:min(820px,calc(100dvh - 48px));border:2px solid #53638b;border-radius:24px;background:var(--ld-surface,#fff);color:var(--ld-ink,#20283b);box-shadow:0 8px 0 #080f24,0 28px 90px #03091d99;overflow:hidden}
.lib-quiz-preview__head {display:flex;align-items:center;gap:14px;padding:18px 22px;background:#101b36;color:#fff;flex-shrink:0}
.lib-quiz-preview__head>div {flex:1;min-width:0}
.lib-quiz-preview__head>img {flex:0 0 44px;border-radius:12px;transform:rotate(-5deg)}
.lib-quiz-preview__head small {display:block;margin-bottom:4px;font-size:11px;font-weight:900;letter-spacing:1.5px;text-transform:uppercase;color:#a9c7ff}
.lib-quiz-preview__head h2 {display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0;color:#fff;font-size:17px;line-height:1.45;font-weight:900}
.lib-quiz-preview__scroll {flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:20px}
.lib-quiz-preview__stage .qe-prev {border-radius:18px;overflow:hidden}
.lib-quiz-preview__stage .qe-prev__prompt {font-size:24px}
.lib-quiz-preview__questions {padding-top:20px}
.lib-quiz-preview__questions .ex-quiz-body__q {color:var(--ld-ink,#20283b)}
.lib-quiz-preview__questions .ex-quiz-body__opt-label {color:var(--ld-ink,#20283b)}
.lib-quiz-preview__status {display:grid;place-content:center;gap:16px;min-height:250px;text-align:center;color:var(--ld-muted,#525f73);font-weight:700;padding:24px}
.lib-quiz-preview__status p {margin:0;line-height:1.6}
.lib-quiz-preview__status button {justify-self:center;padding:11px 22px;border:1px solid #aac6ee;border-radius:12px;background:var(--ld-soft,#e8f0fe);color:var(--ld-brand,#0b57d0);font:800 14px Nunito,system-ui;cursor:pointer}
.lib-quiz-preview__foot {display:flex;justify-content:space-between;align-items:center;gap:16px;flex-shrink:0;padding:16px 22px 20px;border-top:1px solid var(--ld-border,#e7e8f1);background:var(--ld-surface,#fff);font-size:12px;color:var(--ld-muted,#525f73)}
.lib-quiz-preview__play {min-height:44px;border:1px solid #5899ff;border-bottom:0;border-radius:12px;padding:10px 20px;background:linear-gradient(#2878ef,#0b57d0);color:#fff;box-shadow:0 4px 0 #083b91;font:900 15px Nunito,system-ui;cursor:pointer}
.lib-quiz-preview__play:active {transform:translateY(3px);box-shadow:0 1px 0 #083b91}
@media(max-width:600px) {
  .qm-play-mode--arcade,.lib-quiz-preview {padding:12px}
  .qm-play-mode--arcade .qm-play-mode__panel {padding:18px 16px 24px;border-radius:23px;max-height:calc(100dvh - 24px)}
  .qm-play-mode--arcade .qm-play-mode__head {margin-bottom:17px}
  .qm-play-mode__quiz-title {margin-bottom:18px;font-size:12px}
  .qm-play-mode--arcade .qm-play-mode__grid,.qm-play-mode--arcade .qm-play-mode__grid--games {grid-template-columns:1fr;gap:12px}
  .qm-play-mode--arcade .qm-play-mode__tile,.qm-play-mode__grid--games .qm-play-mode__tile {flex-direction:row;align-items:center;gap:15px;padding:13px 15px;min-height:88px;border-radius:17px}
  .qm-play-mode__logo,.qm-play-mode__grid--games .qm-play-mode__logo {width:52px;height:52px;margin:0;border-radius:14px}
  .qm-play-mode__copy,.qm-play-mode__grid--games .qm-play-mode__copy {padding-right:26px;gap:4px}
  .qm-play-mode--arcade .qm-play-mode__name {font-size:21px}
  .qm-play-mode--arcade .qm-play-mode__blurb {font-size:12px}
  .qm-play-mode__go {bottom:calc(50% - 14px)}
  .qm-play-mode__section+.qm-play-mode__section {margin-top:22px}
  .lib-quiz-preview__panel {height:calc(100dvh - 24px);border-radius:20px}
  .lib-quiz-preview__head {padding:14px;gap:10px}
  .lib-quiz-preview__head h2 {font-size:14px}
  .lib-quiz-preview__scroll {padding:12px}
  .lib-quiz-preview__foot {padding:12px 14px 17px;gap:10px}
  .lib-quiz-preview__stage .qe-prev__prompt {font-size:19px}
  .lib-quiz-preview__play {font-size:13px;padding:9px 14px;white-space:nowrap}
}
@media(max-width:360px) {
  .ex-body .lib-res-card .lib-res-act--quiz {font-size:13px;gap:6px;padding-right:8px}
  .lib-res-act__logo {width:27px;height:27px;flex-basis:27px}
  .lib-res-act__play {width:23px;height:23px;flex-basis:23px;font-size:10px}
}
@media(prefers-reduced-motion:reduce) {.qm-play-mode--arcade .qm-play-mode__tile {transition:none}.qm-play-mode--arcade .qm-play-mode__tile:hover:not(:disabled){transform:none}}
/* Persistent Homework assignment, shared by Library quiz launch actions. */
body.lib-homework-open{overflow:hidden}
.lib-homework{position:fixed;inset:0;z-index:11200;display:grid;place-items:center;padding:20px;box-sizing:border-box;background:#070d23c4;backdrop-filter:blur(10px);font-family:Nunito,system-ui,sans-serif}
.lib-homework *{box-sizing:border-box}
.lib-homework__panel{width:min(570px,100%);max-height:calc(100dvh - 40px);overflow:auto;background:var(--ld-surface,#fff);color:var(--ld-ink,#20283b);border:2px solid #627398;border-radius:24px;box-shadow:0 8px 0 #080f24,0 28px 90px #03091d99}
.lib-homework__head{display:flex;align-items:center;gap:14px;padding:22px;background:radial-gradient(ellipse at 100% 0,#3c527d,#101b36);color:#fff}
.lib-homework__head img{flex:0 0 52px;border-radius:14px;transform:rotate(-6deg);filter:drop-shadow(0 3px 3px #0004)}
.lib-homework__head>div{flex:1;min-width:0}
.lib-homework__head h2{margin:0;color:#fff;font-size:24px;font-weight:1000;line-height:1.2}
.lib-homework__head p{margin:6px 0 0;color:#c4d0ed;font-size:13px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lib-homework__head button{flex:0 0 38px;width:38px;height:38px;border:1px solid #7280a559;border-radius:11px;background:#ffffff0c;color:#d9e2ff;font:25px/1 system-ui;cursor:pointer}
.lib-homework__body{padding:24px}
.lib-homework__tabs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:25px}
.lib-homework__tabs button{min-height:56px;padding:10px 12px;border:1px solid var(--ld-border,#e7e8f1);border-radius:13px;background:var(--ld-bg,#f7f8fc);box-shadow:0 4px 0 var(--ld-border,#e7e8f1);color:var(--ld-ink,#20283b);font:900 14px Nunito,system-ui;cursor:pointer}
.lib-homework__tabs button[aria-pressed=true]{background:#0b57d0;color:#fff;border-color:#5899ff;box-shadow:0 4px 0 #083b91}
.lib-homework label{display:flex;flex-direction:column;gap:9px;margin:0 0 20px;font-size:13px;font-weight:900}
.lib-homework input,.lib-homework select{width:100%;min-width:0;min-height:48px;padding:11px 13px;border:1px solid var(--ld-border,#e7e8f1);border-radius:12px;background:var(--ld-bg,#f7f8fc);color:var(--ld-ink,#20283b);font:700 15px Nunito,system-ui}
.lib-homework__actions{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin:26px 0 4px}
.lib-homework__actions button,.lib-homework__primary{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:11px 18px;border:1px solid var(--ld-border,#e7e8f1);border-radius:12px;background:var(--ld-bg,#f7f8fc);color:var(--ld-muted,#525f73);font:900 14px Nunito,system-ui;line-height:1.45;cursor:pointer;text-decoration:none;text-align:center}
.lib-homework .lib-homework__primary{background:linear-gradient(#2c89e5,#0b57d0);border-color:#5899ff;color:#fff;box-shadow:0 4px 0 #083b91}
.lib-homework .lib-homework__primary:active{transform:translateY(3px);box-shadow:0 1px 0 #083b91}
.lib-homework button:disabled{cursor:wait;opacity:.55}
.lib-homework__hint{font-size:12px;color:var(--ld-muted,#525f73);line-height:1.6}
.lib-homework__hint button{border:0;background:none;color:var(--ld-brand,#0b57d0);font:800 12px Nunito,system-ui;cursor:pointer;text-decoration:underline}
.lib-homework__error{padding:12px;border:1px solid #e5a599;border-radius:12px;background:#fff2ed;color:#972f27;font-size:13px;line-height:1.6}
.lib-homework__error[hidden]{display:none}
.lib-homework__error a{font-weight:900;text-decoration:underline}
.lib-homework__status{display:grid;place-content:center;gap:15px;min-height:190px;text-align:center;line-height:1.6;font-weight:700}
.lib-homework__status p{margin:0}
.lib-homework__result{display:flex;flex-direction:column;align-items:center;gap:15px;text-align:center;padding:8px 0}
.lib-homework__check{display:grid;place-items:center;width:60px;height:60px;border-radius:19px;background:#d3f3d7;color:#187139;font-size:35px;font-weight:1000;box-shadow:0 5px 0 #a5d9af;transform:rotate(-6deg)}
.lib-homework__result h3{margin:7px 0 0;font-size:26px;font-weight:1000;color:var(--ld-ink,#20283b)}
.lib-homework__result>p{margin:0}
.lib-homework__result small{margin-top:6px;font-size:12px;font-weight:800;color:var(--ld-muted,#525f73)}
.lib-homework__code{font-size:32px;letter-spacing:4px;font-weight:1000;color:var(--ld-brand,#0b57d0);overflow-wrap:anywhere}
.lib-homework__result>a{margin-top:7px;color:var(--ld-brand,#0b57d0);font-size:14px;font-weight:900;text-decoration:underline}
.lib-homework button:focus-visible,.lib-homework a:focus-visible,.lib-homework input:focus-visible,.lib-homework select:focus-visible{outline:3px solid #f2bc36;outline-offset:3px}
@media(max-width:600px){.lib-homework{padding:12px}.lib-homework__panel{max-height:calc(100dvh - 24px);border-radius:20px}.lib-homework__head{padding:18px 15px;gap:10px}.lib-homework__head h2{font-size:22px}.lib-homework__head img{width:44px;height:44px;flex-basis:44px}.lib-homework__body{padding:20px 16px}.lib-homework__tabs{gap:9px}.lib-homework__tabs button{font-size:13px}.lib-homework input,.lib-homework select{font-size:16px}.lib-homework__actions{justify-content:space-between}.lib-homework__result h3{font-size:23px}}

/* Select the quiz atmosphere before opening Live, Quiz or Assign. */
.qm-play-mode__theme { display:flex; align-items:center; justify-content:space-between; gap:16px; margin:0 0 16px; padding:11px 14px; border:1px solid #8b9bc33d; border-radius:14px; background:#ffffff08; color:#d9e2ff; font-size:14px; font-weight:800; }
.qm-play-mode__theme select { width:min(260px,65%); min-width:0; min-height:40px; padding:8px 34px 8px 12px; border:1px solid #7d8db45c; border-radius:10px; background:#182744; color:#fff; font:inherit; font-weight:700; cursor:pointer; color-scheme:dark; }
.qm-play-mode__theme select:focus-visible { outline:3px solid #ffe16b; outline-offset:3px; }
.qm-play-mode__theme option { background:#182744; color:#fff; }
@media(max-width:480px) { .qm-play-mode__theme { gap:10px; padding:10px 12px; } .qm-play-mode__theme select { width:68%; font-size:13px; } }